Featuring a shape, this product can rotate up to 180 degrees in two directions. The longer side measures 3-7/8inch (98mm), while the shorter side measures 3-3/4inch (95mm). Constructed from zinc plated steel and treated with cutting and polishing techniques, this product boasts excellent resistance to oxidation and rust. Its exquisite craftsmanship ensures that every detail is clearly visible, providing a sturdy and secure attachment. The light fixture crossbar is specifically designed for attaching fixtures and ceiling canopies to electrical junction boxes. It facilitates the installation of wall sconces, most types of ceiling lights, ceiling fans, pendant lights, chandeliers, and hallway lights. The crossbar mounting bracket offers convenient installation on the electrical junction box. Please compliance with local electrical codes and regulations. Colour:As Shown Material:Carbon steel Package Contents: 4set x hanging boards 12x red nut 8x black nuts 8x screws 8x gasket 4x ground wire Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.